Ore-pulverizer.



J. J. KNIGHT.

ORB PULVEBIZEB..

APPLICATION FILED Hanze, 1910.

Patented Jan. 31,1911.

2 SHEETS-SHEET 1.

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Wz'nesses z '-62 i. v

J. J. KNIGHT.

GRE PULVERIZBB.

PPLIoA'nox FILED 14:13.28, me.

Patented Jan. 31,1911.

2 BHEBTHEEZT 2.

' which a number of crushing balls 155-14 are 5 UNITED sTATEs APAJrEirr oEEIoE.

.JOHN J. KNIGHT, 0F ALAMEDA, CALIFORNIA, `ASSIGNOIB TO KNIGHT-CONLON VEBIZING MILL CO., OF SAN FRANCISCO, CALIFORNIA, A CORPOBATION 0F CALI- FOBNLL ORE-PULVEBHER.

Specification of Letters Patent. Patented J an, 31, 1911.

Application led February 28, 1910. Serial No. 546,482.

To all 11:71am 'it may conccm:

Be it known that I, JOHN .Luiss Kxtonr, a citizen of theUnited States, residing at l Alameda, in the county of Alameda and State of California, have invented new and l useful improvements in Ore-Pulverizers, of l which the following is a specification. l

This invention relates to improvements, in grinding and pulverizing mills, and parl ticularly pertains to mills of this character in which the act of comminuting is performed b spherical rollers arranged bei tween supporting and pressing members.

The object of this invention is to provide a grinding and pulverizing mill in which the materials to he connuinuted are fed between coneentrically arranged crushing dies l and rollers or balls. and in which means are l provided for .screening the ground matel rials. Y

A further object is to provide means for l directing and subjecting the coarse ground materials which cannot pass .the screen, to further pulverizing actionso that the product of the mill will be of uniform tiueness, and thoroughly ground. vThe invention consists of the parts and i the construction and combination of parts as hereinafter more fully described and l claimed. having reference to the accompanying drawingS, in which- Figure 1 is a vertical section of the invention on the line .vf-JJ Fig. 2. Fig. 2 is a plan view, with portions broken away to disclose the crushing balls or rollers.

In the drawings, A represents a bed-plate, which is supported upon Vand secured to suitable legs 2. A vertical shaft 3 extends through a bearing A formed on the bedplate A, and is supported on a button l in a bearing 5 mounted on the feet of the vlegs 2. A gear 6 is keyed to the shaft 3 and meshes with a pinion i' which is driven through the pulley S by any suitable power. The upper end of the shaft 3 is provided with a hexagonal or rectangular head B', which is adapted to fit into a correspondinglv shaped recess 9 in a revoluble disk 10. The upper surface of the disk 10 has concentric grooves 11-12 formed therein. in

loosely mounted. `The disk 10 is supported y upon grinding spheres 15 which are moumt ed in a circular groove or channel 113 formed in a supporting ring 1T secured to the bedplate A. A channel 18 is 'formed on the under side of the disk 10, directly beneath the outer groove 12, and above the spheres 15, the channels 16-18 forming a runway for the grlnding spheres 15.

Pressing rings 19-20 bear upon the.

crushing balls 18-14 respectively, each ring having a groove on the under side at the point directly above the corresponding train of crushing balls. The outer ring 20 has upwardly projecting studs 21 formed thereon which are adapted to contact resilient cushions 22, mounted in recesses 23 formed on the head-plate 24. Sc-J soi'ews 25 threaded in the top of the recesses 23, bear against the cushions 22, a washer 26 being interposed between each set screw and cushion. The head-plate 24 rests upon the. inner pressing ring 19, and has a. hopper or opening 2'( formed in the center thereof, through which ore or other material to be ground 1s fed to the grinding elements of the mill.

T he portion of the rcvoluble disk 10 lying beneath the hopper 2? projects upward in conical form as at 28, forming ay distributor, the object of which is to insure the materials to be ground, being evenly cd in a radial g direction, to the circle of crushing rollers 13 beneath the pressing ring 19. outwardly extending members on the head-plate 24, are cored at 29 to pass over the upper ends of vertically arranged bolts 30 which are mounted in the legsA 2, and extend throu h the bed-plate A. The upper ends of t e bolts 30 are threaded to receive nuts 31, and resilient cushions 32 are interposed between the nuts 31 and the extended members of the head-plate M. A screen 33 is mounted on an upwardly projecting flange A* on the bed-plate' A, and encircles the, rcvoluble disk 10.

The annular trough formed between the flange Al and the supporting ring 1T, is provided with an annular lining 3l. preferably made of hardened steel or white iron, 100

means of the revoluble disk 10, diametrically 105 opposed projections 36 on the. latter, extending rearwardly of, and contacting the blades 35 so as to move them forward as the disk 10 revolves. These blades are constructed with the forward end open, and regu'- 110 g Y q 983,067

ward end closed, with one edge contacting the trough lining 34, and the other contacting the periphery of the disk 10, the inclosed space. beneath the blade gradually contracting rearwardly. so that as the blades travel around the trough, the materials therein will be directed between the grinding spheres 15. Y i

In operation the nre or other materials to be ground. and water. are delivered into the hopper T in any suitable manner4 'The disk 1t) being rotated by means of the gears 6 7 and driving pulley 8, the. crushing rollers g 123-1-1 are caused to revolve in their respective runways, in such a manner as to pass l the ore between the rollers and subject itV to a crushing action. The ore is first acted on by the rollers 13. then passes on to theroller.`A 1l. whereafter it dropped over the edge of the disk 10 .into the trough or lining 254. The pressing disk 1S) is'allowed to give or move upward to a certain extent by reason of the cushions 32, and cushions 2; permit of an upward movement of the pressing ring 20. ly this arrangement eitl er ring 19 or '0 may move upward more or less independently of each other, and thus allow refractory particle`V of the material.` to pass between the rollers 1I) or 14. and thus pre` vent clogging of the machine at this point. The crushed material after being subjected to the action of the rollers 12S-14, passes into the space between the rotatable disk 10 and the screen 3f. the liner particles being carried through the screen 33 by the How of water, and delivered to an exterior trough j 3H from whence it is removed in any suitable manner for further treatment. The coarser materials, such as are too large to pass through the screen 33, settle to the bottom of the trough 34, and are deflected by the plow blades 3.3 between the crushing spheres 15 as before described, and are here thoroughly ground so as to pass with-the i other tine materials through the screen 33. The plow blades 3.3 are loosely mounted in the trough 3i, so that if metallic or other refractory materials which resistthe action of the crushing spheres 15 are encountered,

the blades will rise and pass over same. and

thus prevent injury of the blades. The disk 10 is free to be moved upward. when refractory particles of material pass between 1t..

and the rollers 17. but4 as its upward movement is opposed by its own weight, and that of the grinding rollers 13-1-1. pressing rings lll-'20, and the headplate Q4, and also by the opposition-0f the cushions 22, the ordinary materials that tnay resist the action of the upper grinding rollers IIL-14, will be pulverized by the more powerful action of the lower grinding spheres 1.3. The pressure of the pressing ring 20 on the crushing rollers 14 may be regulated by means of the set screws 25, and the pressure on the rollers 13 grinding rollers permits of the adaptation of the mill to handling dill'erent grades of material. By removing the bolts 31, the head-plate 24 may be lifted so as to give access to the pressure rings 12b-2th and rollers 113-14, and the head-plate being removed permits of the disk 1t) being lifted clear of the grinding spheres 15, and thus allows of ready access to the grinding parts for examination or repairs.

Having thus describediny invention, what I claim and desire to secure bv Letters Patent is- 1. The combination in a pulverizing mill. of a horizontally revoluble disk having annular ball races upon its upper and lower surfaces respectively, a channeled bed-plate. a die located in the inner portion of the channel having a ball race corresponding i with the one in the bottom of the superposed disk, a loose or detached plow adapted to travel with the disk and in the outer portion of the bed-platc channel to deliver material into the above named ball race. sai-d revoluble disk having a projection to engage behind the loose plow and thereby move the same forwardly. means for applying Tires-A sure upon the balls in the upper ball race. means for feeding the material. 'to be crushed into the innermost ball race to be carried gcentrifugally outward through the second race and discharged into the bett-plate i channel.

'2. The combination in a pulverizing mill. of a horizontally revoluble disk having an nular ball races upon its upper and lower surfaces respectively. a channeled bed-plate. a die located in the inner portion of the channel having a ball race corresponding with the one in the bottom of the superposed disk, a loose or detached plow adapted to travel with the disk and in the outer porz tion of the bed-plate channel to deliver material into the above named ball race, said revoluble disk having a projectionto engage behind the loose plow and thereby move the pressure upon the balls in the upper ball race. means for feeding the material to be crushed into the innermostball race to be carried centrifugally outward through the second race and discharged into the bed plate channel. and a screen inclosure therefor.

3. The combination in a pulverizing mill. of a `horizontally revoluble disk and driver having concentric ball races in the upper surface and another ball race in the lower surface. an annular channeled bed-plate having a ball race coincident with that of the disk. independent pre-:smvI rings having ball races corresponding with those in the upper I surface of the disk, a main cap with adjustable pressure devices actin 'upon the inner of said fessure rings, stu s projecting upchannel, said disk having a projection to engage behind the detached p ow and thereby 15 more the same forwardlyand a surrounding screen through, which the crushed material is delivered outwardly.'

In testimony whereof I have hereunto set my hand in the presence of twolsubscribing 20 witnesses. Y 'l W. B. S'rnatm,Y E. S. Paar. Y 

